#include<stdio.h>
int main()
{
	int x = 0;
	scanf_s("%d", &x);
	if (x < 1)
		printf("y=x=%d", x);
	else if (x >= 10)
		printf("y=3*x-11=%d", (3 * x - 11));
	else
		printf("y=2*x-1=%d", (2 * x - 1));
	return 0;
}